Reliability of still photography measuring habitual head deviation from midline in infants with congenital muscular torticollis

Pediatr Phys Ther. Winter 2010;22(4):399-406. doi: 10.1097/PEP.0b013e3181f9d72d.

Abstract

Purpose: To establish intrarater and interrater reliability of still photography for measuring habitual head deviation from midline in infants with congenital muscular torticollis (CMT).

Methods: Two investigators took still photographs of 30 infants with CMT in a supine position and measured head deviation angles with a protractor. Data analysis included paired t tests, Pearson r, and intraclass correlation coefficients (ICC) with 95% confidence intervals.

Results: Pearson r varied from 0.80 to 0.85 for the same rater and from 0.72 to 0.99 for 2 different raters. The ICC (3,1) varied from 0.79 to 0.84, and ICC (2,1) varied from 0.72 to 0.99. Participants with smaller head-tilt angles showed greater variability in head position.

Conclusions: Still photography is a reliable method for measuring habitual head deviation from midline in infants with CMT. Several modifications to the measurement procedure have been suggested.

Publication types

  • Validation Study

MeSH terms

  • Arthrometry, Articular
  • Confidence Intervals
  • Diagnosis, Differential
  • Female
  • Head / anatomy & histology*
  • Head-Down Tilt
  • Humans
  • Infant
  • Infant Welfare*
  • Male
  • Movement
  • Neck / anatomy & histology
  • Neck Muscles / anatomy & histology
  • Photography / instrumentation
  • Photography / methods*
  • Physical Therapy Modalities / instrumentation
  • Range of Motion, Articular / physiology
  • Reference Values
  • Reproducibility of Results
  • Statistics as Topic
  • Torticollis / congenital
  • Torticollis / diagnosis
  • Torticollis / rehabilitation
  • Treatment Outcome

Supplementary concepts

  • Congenital torticollis